Tap and reamer wrench



(ModeL) H. E. WOODS.

TAP AND REAMER WRENCH.

No. 294.104. "Patented Feb. 26, 1884.

77 Z 7757f if 77' I UNITED STATES j PATENT o FIC'E.

HARRY E. XVOODS, OF WEST SOMERVILLE, MASSACHUSETTS.

TAP AND REAMER WRENCH.

SPECIFICATION forming part of Letters Patent No. 294,104, dated February26, 1884.

' .Application filed May 24, 1833. (Modem To all whom it may concern Beit known that I, HARRY E. VVOODS, of West Somerville, in the county ofMiddleseX and State of Massachusetts, have invented certain Improvementsin Tap and Reamer Wrenches, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,making part of this specification, in which- Figure 1 is a perspectiveview of a tap or reamer wrench constructed in accordance with myinvention. Fig. 2 is a plan of the under side of the same, a portion ofthe coveringplate being broken away to show the location of the ratchetand pawl. Fig. 3 is a horizontal'section, representing the constructionof the grippingj aws and their arrangement within the ratchet-block.Fig. 4 is a view of the ratchet inverted. Fig. 5 is a horizontal sectionthrough the tool-holder; Figs. 6 and 7, sectional details to be referredto.

My present invention relates particularly to that class of wrenchesprovided with a central enlarged portion for the accommodation of a pairof jaws, and with a pair of handles arranged diametrically opposite eachother, said wrenches being designed for use for operating taps, reamers,&c.; and this inventionconsists in a ratchet-block having a slot inwhich are located a pair of jaws, one or both of which are capable ofadjustment for grasping the head of the working-tool, in combinationwith a stock or holder provided with a central hollow portion for thereception of the ratchet, and with one or more spring-pawls to engagewith the latter, said ratchet being held within the holder by anadjustable pin or other device when the work is in progress, and beingliberated so as to allow of the independent rotation of the holder intoa position for the successive advancement of the tool.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out.

In. the said drawings, A represents a stock or holder consisting of acentrally-located enlarged portion, at, having a circular opening,

B, which is of the same diameter as and rests upon the upper side of theenlarged portion a of the holder A, saidratchet B (seen inverted, Fig.4) fitting into the opening I), and being held in place therein by athin circular plate, 0, screwed to the ratchet at i i i, Figs. 2 and 7.7c is a pin passing through a hole, is, Fig. 6, in the ratchet-block B,and entering a hole, k, in the central enlarged portion of the holderA,said pin having a shoulder, 8, formed at its bottom and a projection, 9,under its head, and the hole in the ratchet-block B having an aperture,12, Fig. 3, at its side, to allow of the passage therein of theprojection when brought in line therewith. The diameter of the hole 70'is enlarged below its top, to form a shoulder, 13, between which and theshoulder 8 (surrounding the pin k) is a spiral spring, 14, Fig. 6, toinsure its retention in the hole 70', and thus prevent the ratchet fromrotating independently of the stock when the tap or reamer is doing itswork, the with drawal of the pin 70 from the hole in the stock (againstthe resistance of the spring 14) leaving the stock free to be carriedback or rotated independently of the ratchet, in order to take a newhold upon and continue to advance the same when the forward movement ofone of the handles 0 has been arrested by contact with a contiguousobject. WVhen the pin is is withdrawn from the hole in the stock, it iskept from returning therein by partially rotating it till its projection9 is brought to one side of the aperture .12, and allowing it to bear onthe upper surface of the ratchet-block, Fig. 6.

Extending down through and at the center of the ratchet-block- B isformed a rectangular slot, Z, in which is located a stationary jaw, on,and a movable jaw, a, capable of being adjusted to and from the formerby a thumbscrew, 1), which passes through the side of the ratchet-blockB into the slot and into a screwthreaded hole, q, formed in the movablejaw.

This adjusting thumb-screw p is prevented from being turned out of theside of the ratchrod enters the" contiguous side wall ..of therectangular slot Z, and the other half of the rod projects beyond saidwall and enters the contiguous channel in the jaw. The channels in thesides of the stationary jaw are made slightly smaller or shallower thanthose in the movable jaw, in order that when the guiderods are driven inthrough the ratchet-block they willwedge themselves into the channels ofthe sta tionary jaw, and thus securely hold it in place, while, as theguide-rods do not snugly fit the channels of the movable jaw, the latteris left free to be slid thereon when the thumb-screw p is turned. Thesmooth shank of the thumbscrew is first passed through the side of theratchet-block and the head of the thumb-screw secured by driving a smallpin through it, aft'er which the screw is turned into the movable jaw.The two jaws are then held in their proper position in the slot Z, whenthe two guide-rods 1'1 are driven in through the ratch- 1-; et-block,wedging and permanently holding the stationary jaw m and loosely fittingthe channels of the movable jaw, as desired. Each jaw is provided withtwo faces at right angles to each other, to accommodate the square headof the working -tool to be grasped between them, the lower portion ofthe tool extending down through a central circular opening, 8, in theratchet B. To enable the tool to be turned in the opposite directionwithout reversing the ratchet, a second pawl may be used,in which caseit is only nccessary'that the form of the ratchet-teeth and that of thepawls conform to each other.

In the foregoing it is stated that the ratchet is preferably formed inthe same piece as the ratchet-block B; but it is evident that they maybe made separately and afterward united securely together.

I claim- The ratchet-block B, with its ratchet B, slot In presence of-N. W. STEARNS, J AS. W. CHAPMAN.

